The Sedimentology and Stratigraphic Significance of Cretaceous Sediments at MT Howie, Ne South Australia

Abstract

Sediments forming the type section of the Late Cretaceous Mount Howie Sandstone in the Cordillo Dome in northeastern South Australia were investigated. The results show that, based on the palynologically determined age and the lithological, stratigraphic, textural and mineralogical continuity of the sediments, along with the possible volcanogenic origin of some of the clay clasts, the sediments at Mt Howie are mid Cretaceous Winton Formation capped by Cordillo Silcrete. We have thus placed the formal Late Cretaceous Mount Howie Sandstone as a member of the Winton Formation.